Sounds of Speech. Iowa University
This link carries you to an amazing pronunciation world focused on Spanish, English, and German sound production. Herein, you will visualize how sounds are uttered and articulated properly to sound as a native speaker.
Check this link frequently to reinforce the theory and practice the different sound production.
Best wishes
Click http://soundsofspeech.uiowa.edu/index.html#english link to open resource.
Click on Sounds of Speech. Iowa University to open the resource.